Physics Commons^™

Development And Evaluation Of A Novel Automated Physchophysical Instrument For The Investigation Of Nyctalopia Using Multiple Stimulus Light Emitting Diode Matrix Display Arrays., David M.C. O'Brien

Doctoral

Vitamin A deficiency primarily affects young children in developing countries, the symptoms of which initially present as nyctalopia, an inability of the eyes of ‘see’ in low luminance levels, specifically at twilight or at night. Vitamin A deficiency is a major cause of blindness in developing countries and is associated with significant increases in child morbidity and mortality. Nyctalopia may be examined using dark adaptometry; however, current methods of dark adaptometry have many practical limitations, including their unsuitability for use with children. This thesis reports on the design, construction, testing and evaluation of a novel automated dark adaptometer for use …